I'm not sure I can give you a detailed response, except to say that we all know that there are Canadian citizens who have been swept up in the dragnet of this U.S. campaign to deport non-citizens.
I probably know the same as you, based on what is reported in the media and in anecdotes, about Canadians taken into detention and then disappeared for periods of time. These things didn't happen in the past. This underscores that we have entered a fundamentally different phase of conduct in the United States. It is certainly racialized; there's no doubt about that. The fact that Canadians have been swept up in it, including Canadians who are racialized as white, tells us something about how expansive this campaign is.